Oh my, yes they have a language for everything. I have to laugh while at the Poultry Show in Windsor, Me. We have Americauna/cross chickens, had 1 blue roo. He was a sweet talker, walking up to the girls and bok bok bahbok, even walking up to me with that sweet talk.
I was back to this cage, backed up to allow someone to pass by when I heard bok bok bahbok....turning around it was a beautiful Americauna roo!
Aparently that is the friendly hi baby talk! It was just tooo funny!
So yes, they have different types of conversations, meanings and even if you don't want to be like me...sitting in the chicken yard, copying the chicken sounds, they seem to enjoy any conversation that you have.